Inventor

NII KATSUTOSHI

JP37 patents

⚠️ This page may combine multiple inventors who share the name “NII KATSUTOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NII KATSUTOSHI

HITACHI LTD

Oil impregnated porous bearing units and motors provided with same

Spindle motor and magnetic disc device using thereof having radial and thrust bearings

Assembly method of motor using magnetic lubrication fluid

Disk drive with unbalance correcting mechanism

Spindle motor and magnetic disc device with hydrodynamic bearing

Magnetic disk apparatus, including spindle motor having air flow passage in hub for pressure balance

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Rotary body bearing apparatus, motor and polygon mirror motor

Bearing apparatus

Magnetic fluid bearing unit structure and motor having the same

Bearing unit

Motor, a printer having such a motor and a disk drive system having such a motor

Sealed magnetic fluid bearing for polygon mirror drive motor

Vertical motor, method of manufacturing same, polygon mirror motor using said motor, and bearing device for use in said motor

Sealed magnetic fluid bearing for polygon mirror drive motor

Magnetic fluid bearing apparatus and motor having magnetic fluid bearing apparatus

Submersible thrust bearing apparatus

Method of producing bearing component

Oil retaining bearing unit and motor having oil retaining bearing unit

Motor with a bearing lubricated by magnetic fluid

End face mechanical shaft seal for use in hydraulic machines and seal ring assembly for use in the shaft seal

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Disk apparatus and motor therefor

Spindle motor and magnetic disc device with hydrodynamic bearings

Bearing apparatus

Vertical shaft type pump

Hydraulic machine shaft seal with centrifugal removal of sand and soil particles

X-Ray tube apparatus

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Sealing device for rotor shaft of fluid machine

HITACHI POWDERED METALS

Bearing unit, production method therefor and spindle motor

Spindle motor

Dynamic bearing unit

Sintered bearing and production method therefor

MINEBEA CO LTD

Sintered bearing and production method therefor

Spindle motor

Production method for sintered bearing member, fluid dynamic pressure bearing device, and spindle motor